package cn.edu.scau.cmi.shishuai.exercise9;

import java.util.Scanner;

public class Example9_9 {

	public static void main(String[] args) {
		String regex = "[a-zA-Z]+";
		Scanner scanner = new Scanner(System.in);
		String str = scanner.nextLine();
		if(str.matches(regex)) {
			System.out.println(str + "中的字符都是英文字母");
		}

	}

}
